Link to pod files on GitHub

[Grinnz]

As suggested at http://blogs.perl.org/users/grinnz/2019/10/request-for-feedback-perl-documentation-site.html#comment-1807822

Since Perl source is now on GitHub, we could link to the GitHub page for that source file to make documentation contributions easy.

[Grinnz]

This could also include module sources but we should take care not to do it for CPAN-upstream sources.

[scottchiefbaker]

I think this would be a great idea. 👍 from me

[MasterInQuestion]

    Somewhat related:
    Accepting a URL input for text file and render its Pod?
    E.g. https://perldoc.pl/?url=https://github.com/bugzilla/bugzilla/raw/5.2/Bugzilla/Extension.pm

[Grinnz]

I don't see how that is related, and no, I will not be rendering data from arbitrary URLs.

[MasterInQuestion]

    Rationale:
    Pod relies post-rendering to properly display:
    While there lacks proper built-in support for so.
    (such is also the case for many GitHub Perl files)

    Security aspect, should be no worse than GitHub itself:
    Which just has to render these files in different manner.

[Grinnz]

There are methods to render POD from arbitrary URLs to HTML, such as the perldoc command-line program. That is out of scope for this application.

[MasterInQuestion]

    Styling is a significant part, though.

    Web accessibility also.